Regular Expressions and Nesting

SargeZT

For once, I have to ask a question. I've been grappling with this for a while now, and I'm going to break down and ask.

Let's say I have a page, with nested if statements. Something like:

if ($one) {
  if ($two) {
  //Blah
  }
  else {
  //Other blah
  }
}
else {
  if ($three) {
    if ($four) {
    }
  }
}

To any arbitrary nesting level, is there any way to use a preg_match_all to parse all the first level if's into an array, then the second levels, and so on?

If I didn't make it clear, the code above is not being parsed through PHP, but through a preg_match_all.

I'd think the versatility of RegEx would have something in it's pocket that can take care of this quite handily.

Thanks.

FatalError

It depends on what the "blahs" are. What are you trying to do with this? If I understand your question correctly, you can just use a switch statement. I don't see what preg_match_all has to do with this...

SargeZT

The insides of the IFs don't matter. I'm not actually executing any of the code. I'm trying to split the contents of the IFs into different arrays. The //blahs are simply the code inside of the IFs, and are completely unimportant.

Sorry if this is nonsensical, but it's the only way I can come up with to explain my problem.

FatalError

You could have an array like this:

$array = array();
$array[$one] = // blah;
$array[$one][$two] = // blah;
// etc, etc...

And then you just have a statement that checks for the elements in that array.

SargeZT

All right, I think my underwhelming explanation of my problem is being misinterpreted.

I'll make it a bit simpler this time.

I have the following variable:

$variable = "
if ($var1 == $var2) {
   if ($var3 == $var1) {
      //blah
   }
   else {
   //blah2
   }
}"

I want to parse that string, and make an array like this:

$array = array();
$array[0] = "$var1 == $var2";
$array[0][0] = "$var3 == $var1";
$array[0][0] = "//blah";
$array[0][1] = "//blah2";

But now, imagine that the code is complex enough to have an $array[25][57].

I want to make a function or a class which parses these long strings into multidimensional arrays.